scholarly journals Treatment patterns and effectiveness of patients with multiple myeloma initiating Daratumumab across different lines of therapy: a real-world chart review study

BMC Cancer ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Shebli ATRASH ◽  
Philippe THOMPSON-LEDUC ◽  
Ming-Hui TAI ◽  
Shuchita KAILA ◽  
Kathleen GRAY ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Clinical Outcomes ◽  
Real World ◽  
Chart Review ◽  
Response Rate ◽  
Progression Free Survival ◽  
Treatment Patterns ◽  
Free Survival ◽  
Kaplan Meier ◽  
Line Of Therapy

Abstract Background Daratumumab, a CD38 monoclonal antibody, has demonstrated efficacy as monotherapy and combination therapy across several indications, both among newly-diagnosed and refractory patients with multiple myeloma (MM). However, there is limited evidence on treatment patterns and effectiveness of daratumumab in the real-world setting, particularly in first line (1 L). This study aimed to describe real-world treatment patterns and clinical outcomes among patients initiating daratumumab across different lines of therapy. Methods A retrospective chart review of adult patients with MM initiating daratumumab between November 2015 and March 2021 was conducted at two clinical sites in the United States. De-identified patient-level data were abstracted in an electronic case report form. Patient characteristics and treatment patterns were described. Clinical outcomes including overall response rate (ORR), progression-free survival, and time to next line of therapy were reported using descriptive statistics and stratified by line of therapy (1 L, second line [2 L] or third line or later [3 L+]). A sub-group analysis evaluated treatment patterns and ORR among patients re-treated with daratumumab. Results A total of 299 patients were included in the study (mean age: 68 years; 55% male). Among them, 26 were 1 L patients, 66 were 2 L patients, and 207 were 3 L+ patients; 110 patients (36.8%) received a stem cell transplant prior to daratumumab initiation. The mean duration of follow-up was 10 months among 1 L patients and 19 months among 2 L and 3 L+ patients. Patients who initiated daratumumab in 1 L had a 100% ORR, while those initiating in 2 L and 3 L+ had an ORR of 78.8 and 65.2%, respectively. Among re-treated patients, ORR was 66.7% during the first treatment segment, and 52.9% during the second treatment segment. Kaplan-Meier rates of progression-free survival at 12 months were 89.9, 75.2, and 53.1% among patients who initiated daratumumab in 1 L, 2 L, and 3 L+, respectively. Kaplan-Meier rates of time to next line of therapy at 12 months were 94.1, 73.4, and 50.0% among patients who initiated daratumumab in 1 L, 2 L, and 3 L+, respectively. Conclusions These findings suggest that daratumumab-based regimens are an effective treatment option across all lines of therapy, with highest response rate in 1 L.

scholarly journals A real-world comparative analysis of carfilzomib and other systemic multiple myeloma chemotherapies in a US community oncology setting

2019 ◽  
Vol 10 ◽  
pp. 204062071881669 ◽  
Author(s):  
Robert M. Rifkin ◽  
Rohan Medhekar ◽  
E. Susan Amirian ◽  
Kathleen M. Aguilar ◽  
Thomas Wilson ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Real World ◽  
Progression Free Survival ◽  
Phase Iii ◽  
Real World Data ◽  
Kaplan Meier ◽  
Hazard Ratios ◽  
Community Oncology ◽  
First Relapse ◽  
Line Of Therapy

Background: Most multiple myeloma (MM) patients ultimately progress, with remission duration decreasing after first relapse. Recently, novel agents have been approved for the treatment of relapsed MM. There is a paucity of real-world data on these treatments. We sought to compare time to next treatment (TTNT) in MM patients in their second line of therapy (LOT2), treated with common proteasome inhibitor (PI)-based triplets. Methods: Adult MM patients who received carfilzomib (K) between 1 November 2013 and 29 February 2016 at US Oncology Network (USON) clinics utilizing iKnowMed™ electronic health records (EHRs) were identified. Patients were included if they were ⩾18 years of age, not enrolled in clinical trials, had ⩾2 visits at a USON clinic and received LOT2 regimens consisting of: K+lenalidomide with steroid (KRd), bortezomib+lenalidomide with steroid (VRd), or bortezomib+cyclophosphamide with steroid (VCyd). TTNT was estimated from LOT2 initiation to LOT3 initiation using the Kaplan–Meier method, and hazard ratios (HRs) were estimated using Cox modeling. Results: A total of 718 patients received a K-containing regimen sometime during their MM treatment (LOT1 to LOT5). Of these, 156 patients received: KRd ( n = 112; 71.8%), VRd ( n =27; 17.3%), or VCyd ( n = 17; 10.9%). Baseline characteristics were similar between groups (mean age: 64.8 years; 58% male). Median TTNT was longest for KRd [25.3 months; 95% confidence interval (CI): 19.71–NR], versus VRd or VCyd (VRd median TTNT: 10.2 months, 95% CI: 4.24–12.71; VCyd: 6.5 months, 95% CI: 3.02–12.78; log-rank p < 0.0001). The adjusted HR for KRd was 0.19 (95% CI: 0.11–0.37), compared with VRd. Conclusions: Considering the real-world nature of these data, the median TTNT observed with KRd was relatively consistent, with progression-free survival (PFS) for KRd observed in the phase III ASPIRE trial (median PFS: ITT population = 26.3 months; LOT2 = 29.6 months). Patients who received KRd at first relapse had significantly longer TTNT, compared with those on VRd or VCyd, confirming the value of KRd as an important treatment option for relapsed MM.

scholarly journals Current Real-World Treatment Patterns and Outcomes in Patients with Relapsed/Refractory Multiple Myeloma

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 3290-3290
Author(s):  
Jenny Willson ◽  
Amanda Bruno ◽  
Joanna Opalinska ◽  
Jeannene Nelson ◽  
Orsolya Lunacsek ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Median Time ◽  
Real World ◽  
Bone Pain ◽  
Chart Review ◽  
Treatment Patterns ◽  
Employment Equity ◽  
Refractory Multiple Myeloma ◽  
Equity Ownership ◽  
Line Of Therapy

Abstract Introduction: Limited real-world data exist on treatments for relapsed/refractory multiple myeloma (RRMM) since the approval of several new agents. This study assessed treatment patterns and outcomes of patients with RRMM receiving ≥2 lines of therapy in US community oncology practices. Methods: A chart review was conducted in patients ≥18 years with MM diagnosed January 1, 2011-May 31, 2017, from a large electronic medical record database. Patient data were examined from the date of initiation of first-line therapy (1LT) for MM until death, loss to follow-up, or study end date, whichever was earliest. This study was hypothesis generating, thus no statistical tests were performed. Descriptive statistics were used to describe baseline demographic/clinical characteristics, treatment patterns, median progression-free survival (mPFS) and median overall survival (mOS) for the overall RRMM population. Patients were then stratified into "older" vs. "newer" treatment cohorts based on whether the drugs used in each line of therapy were approved before, or after 2013. Results: Of 1005 charts reviewed, 456 patients had received ≥2 lines of therapy and were included in the chart review study (median age at diagnosis: 70.4 years; females: 39.5%, males 60.5%; bone involvement at diagnosis: 66.0%; International Staging System stage within 1 month of diagnosis: I 28.7%, II 27.9%, III 43.4%; 183 (40.1%) patients received 3LT, 75 (16.4%) 4LT, and 29 (6.4%) 5LT. 1LT was dominated by bortezomib (BTZ), lenalidomide (LEN), and the combination of the two, with 93.3% of patients using these agents as 1LT and 69.8% of patients as 2LT. In 3LT and beyond, there was greater use of newly approved drugs (approved since 2013) compared with 1LT and 2LT; pomalidomide (14.8% 3LT, 17.3% 4LT, 17.2% 5LT), carfilzomib (19.1% 3LT, 13.3% 4LT, 17.2% 5LT), elotuzumab (2.2% 3LT, 4.0% 4LT, 3.4% 5LT), panobinostat (0% 3LT, 2.7% 4LT, 3.4% 5LT), daratumumab (6.6% 3LT, 13.3% 4LT, 17.2% 5LT), and ixazomib (0% 3LT, 1.3% 4LT, 3.4% 5LT) with the exception of the BTZ/LEN combination. However, patients receiving either BTZ, LEN, or both in combination as 1LT or 2LT often received the agent(s) as re-treatment in lines 2-6 (46.2%-55.6%). Median time on treatment decreased from 7.5 months in 1LT to ≤2.3 months in 4LT and 5LT, and median treatment-free intervals decreased from 1.6 months between 1LT and 2LT to 0.5 months between 4LT and 5LT. The most common reason for discontinuation was disease progression and drug toxicity/intolerability. The most commonly reported adverse events (AEs) for all lines of therapy were fatigue (71.6%-78.3%), bone pain (38.5%-69.1%) and anemia (53.8%-69.3%). AEs were generally constant across lines of therapy, except for bone pain, anemia, and neuropathy, which broadly decreased with increasing line of therapy. Overall, mPFS ranged from 12.0 months in 1LT to 3.5 months in 5LT and mOS ranged from 48.2 months in 1LT to 5.8 months in 5LT (Figure 1). A trend for increased mPFS and mOS with newer vs. older drugs was observed across treatment lines. The magnitude of the "new" treatment benefit on mPFS was pronounced in 1LT. Conclusions: Forty percent of patients received therapy beyond 2lines demonstrating a great unmet need in the treatment of RRMM. While BTZ and LEN were predominant in 1st and 2nd lines, substantial fragmentation was seen in ≥3 line, highlighting the lack of defined treatment pathways for these patients. The results further indicated that treatments beyond 2LT offer shorter benefit as disease progresses; median time on treatment and mPFS decreased as treatment line increased. Also, median PFS and OS in this real-world analysis were also slightly lower than that observed in recent clinical trials of novel agents, which is consistent with other real-world studies. While there remains a need to replicate these results within a larger dataset where statistical comparisons could be made and confounding factors controlled for, the trends observed in this study suggest improved PFS and OS outcomes may be associated with newly approved treatments. In particular, the trends suggested that newer treatments may have a greater mPFS benefit vs. older treatments if used in earlier lines of treatment. Funding: GSK (HO-17-17767) Disclosures Willson: GlaxoSmithKline: Employment, Equity Ownership. Bruno:GlaxoSmithKline: Employment, Equity Ownership. Opalinska:GlaxoSmithKline: Employment, Equity Ownership. Nelson:GlaxoSmithKline: Equity Ownership. Stafkey-Mailey:Xcenda: Employment.

scholarly journals Pomalidomide Plus Low-Dose Dexamethasone in Relapsed/Refractory Multiple Myeloma Patients: Results of the Real-World “POWERFUL” Study

2021 ◽  
Vol 10 (7) ◽  
pp. 1509
Author(s):  
Evangelos Terpos ◽  
Panagiotis Repousis ◽  
Chrysavgi Lalayanni ◽  
Evdoxia Hatjiharissi ◽  
Theodora Assimakopoulou ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Real World ◽  
Low Dose ◽  
Safety Data ◽  
Progression Free Survival ◽  
Routine Care ◽  
Refractory Multiple Myeloma ◽  
Kaplan Meier ◽  
Line Of Therapy

The “POWERFUL” multicenter, retrospective, and prospective study investigated the effectiveness of pomalidomide plus low-dose dexamethasone (POM/LoDex) therapy in relapsed/refractory multiple myeloma in routine care in Greece. Ninety-nine eligible adult patients treated with POM/LoDex according to the approved label after having received ≥2 prior therapies, including lenalidomide and bortezomib, were consecutively enrolled between 16 November 2017 and 21 February 2019 in 18 hematology departments. Fifty patients (50.5%) started POM/LoDex as third-line treatment. During the treatment period (median: 8.3 months; range: 0.3–47.6 months), the median POM dose was 4 mg/day, and 31.3% of the patients received additional antimyeloma agents. The overall response rate was 32.3%. During a median follow-up period of 13.8 months (Kaplan–Meier estimate), the median progression-free survival (PFS) was 10.5 months (95% CI: 7.4–14.4). The PFS was not significantly different between patients receiving POM/LoDex in the third versus later line of therapy, nor between patients receiving concomitant antimyeloma therapy versus POM/LoDEx doublet. During the prospective safety data collection period (median: 7.6 months) among patients with prospective follow-up (N = 75), POM-related adverse event incidence rate was 42.7% (serious: 18.7%; grade  ≥  3 hematological POM-related adverse events: 8.0%). Only neutropenia (13.3%) was reported at a frequency ≥10%. In conclusion, in this real-world study, POM/LoDex displayed a long PFS with no new safety signals emerging.

scholarly journals Response and Toxicity to the Second Course of 3 Cycles of 177Lu-PSMA Therapy Every 4 Weeks in Patients with Metastatic Castration-Resistant Prostate Cancer

Cancers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 2489
Author(s):  
Sazan Rasul ◽  
Tim Wollenweber ◽  
Lucia Zisser ◽  
Elisabeth Kretschmer-Chott ◽  
Bernhard Grubmüller ◽  
...  
Keyword(s):  
Response Rate ◽  
Cox Regression ◽  
Progression Free Survival ◽  
Castration Resistant Prostate Cancer ◽  
Radioligand Therapy ◽  
Free Survival ◽  
Castration Resistant ◽  
Kaplan Meier ◽  
Node Metastases ◽  
Grade 3

Background: We investigated the response rate and degree of toxicity of a second course of three cycles of [177Lu]Lu-PSMA radioligand therapy (PSMA-RLT) every 4 weeks in mCRPC patients. Methods: Forty-three men (71.5 ± 6.6 years, median PSA 40.8 (0.87–1358 µg/L)) were studied. The response was based on the PSA level 4 weeks after the third cycle. The laboratory parameters before and one month after the last cycle were compared. Kaplan–Meier methods were used to estimate the progression-free survival (PFS) and overall survival (OS), and the Cox regression model was performed to find predictors of survival. Results: Twenty-six patients (60.5%) exhibited a PSA reduction (median PSA declined from 40.8 to 20.2, range 0.6–1926 µg/L, p = 0.002); 18 (42%) and 8 (19%) patients showed a PSA decline of ≥50% and ≥80%, respectively. The median OS and PFS were 136 and 31 weeks, respectively. The patients with only lymph node metastases survived longer (p = 0.02), whereas the patients with bone metastases had a shorter survival (p = 0.03). In the multivariate analysis, only the levels of PSA prior to the therapy remained significant for OS (p < 0.05, hazard ratio 2.43, 95% CI 1.01–5.87). The levels of hemoglobin (11.5 ± 1.7 g/dL vs. 11 ± 1.6 g/dL, p = 0.006) and platelets (208 ± 63 g/L vs. 185 ± 63 g/L, p = 0.002) significantly decreased one month after cycle three, though only two grade 3 anemia and one grade 3 thrombocytopenia were recorded. Conclusion: A further intensive PSMA-RLT course is well tolerated in mCRPC patients and associated with promising response rates and OS.

Clinical Outcomes of 2nd- and 3rd-Line Regorafenib for Advanced Hepatocellular Carcinoma

Oncology ◽  
2021 ◽  
pp. 1-8
Author(s):  
Kensuke Naruto ◽  
Tomokazu Kawaoka ◽  
Kei Amioka ◽  
Yutaro Ogawa ◽  
Kikukawa Chihiro ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Clinical Outcomes ◽  
Median Overall Survival ◽  
Response Rate ◽  
Kinase Inhibitor ◽  
Progression Free Survival ◽  
Advanced Hepatocellular Carcinoma ◽  
Free Survival ◽  
Line Therapy ◽  
Unresectable Hepatocellular Carcinoma

<b><i>Introduction:</i></b> This study compared clinical outcomes of 2nd- and 3rd-line regorafenib in patients with unresectable hepatocellular carcinoma. <b><i>Methods:</i></b> In this retrospective cohort study, 48 patients were treated with regorafenib for unresectable hepatocellular carcinoma. Thirty-five and 13 patients were initiated on 2nd- and 3rd-line therapy, respectively. We assessed the responses to and safety of the therapy. <b><i>Results:</i></b> There were no statistically significant differences in clinical characteristics at the start of 2nd- or 3rd-line regorafenib therapy. The overall response rate of 2nd- and 3rd-line regorafenib was 20 and 8%, respectively. The disease control rate was 57 and 54%, respectively. Median overall survival (mOS) from the start of 2nd-line regorafenib was 17.5 months. mOS from the start of 3rd-line regorafenib was not obtained. Median progression-free survival of 2nd- and 3rd-line regorafenib was 4.9 and 2.3 months, respectively. mOS from 1st-line therapy with tyrosine kinase inhibitor plus sorafenib-regorafenib-lenvatinib was 29.5 months; that with lenvatinib-sorafenib-regorafenib was not obtained. Patients on 3rd-line therapy tended to have better Child-Pugh scores and tumor factors at the start of 1st-line therapy than other patients. <b><i>Conclusion:</i></b> Patients on 2nd- and 3rd-line regorafenib showed favorable responses. Good Child-Pugh scores and tumor factors may be associated with a better response rate and OS.

637 Immune-related adverse events (irAEs) may indicate a favorable prognosis in metastatic renal cell carcinoma (mRCC) patients treated with immune checkpoint inhibitors (ICI)

2020 ◽  
Vol 8 (Suppl 3) ◽  
pp. A672-A673
Author(s):  
Dylan Martini ◽  
Sean Evans ◽  
Subir Goyal ◽  
Yuan Liu ◽  
T Anders Olsen ◽  
...  
Keyword(s):  
Renal Cell Carcinoma ◽  
Overall Survival ◽  
Adverse Events ◽  
Clinical Outcomes ◽  
Immune Checkpoint Inhibitors ◽  
Checkpoint Inhibitors ◽  
Progression Free Survival ◽  
Free Survival ◽  
Kaplan Meier ◽  
Emory University

BackgroundImmune checkpoint inhibitors (ICI) have become an increasingly utilized treatment in metastatic renal cell carcinoma (mRCC). Although they have a favorable toxicity profile, immune-related adverse events (irAEs) can have a significant impact on patients‘ quality of life. It is not well understood whether irAEs are associated with improved clinical outcomes. We investigated the relationship between irAEs and clinical outcomes in mRCC patients treated with ICI.MethodsWe performed a retrospective study of 200 patients with mRCC who received ICI at Winship Cancer Institute of Emory University from 2015–2020. Clinical outcomes were measured by overall survival (OS), progression-free survival (PFS), and clinical benefit (CB). OS and PFS were calculated from ICI-initiation to date of death and radiographic or clinical progression, respectively. CB was defined as a best radiographic response of complete response (CR), partial response (PR), or stable disease (SD) for >6 months per response evaluation criteria in solid tumors (RECIST) version 1.1. Toxicity data was collected from clinic notes and laboratory values. The association with OS and PFS was modeled by Cox proportional hazards model. Kaplan-Meier curves were created for survival estimates.ResultsMost patients were males (71%), and 78% had clear-cell RCC (ccRCC). Most patients (58%) received anti-PD-1 monotherapy. The majority were international mRCC database consortium (IMDC) intermediate (57%) or poor-risk (26%). Anti-PD-1 monotherapy was the most common (58%) treatment regimen and most patients received ICI as first (38%) or second-line (42%) treatment. One-third of patients (33%) experienced an irAE, with the most common being endocrine (13%), gastrointestinal (11%), and dermatologic (10%). Patients who experienced irAEs had significantly longer OS (HR: 0.52, 95% CI: 0.32–0.87, p=0.013), higher chance of CB (OR: 2.10, 95% CI: 1.11–4.00, p=0.023) and showed a trend towards longer PFS (HR: 0.71, 95% CI: 0.49–1.02, p=0.065) in MVA (table 1). Patients who had thyroid irAEs had significantly longer OS, PFS, and higher chance of CB in MVA (table 1). The objective response rate was higher for patients who experienced irAEs (34% vs. 18%). Patients who experienced irAEs had significantly longer median OS (44.5 vs. 18.2 months, p=0.005) and PFS (7.5 vs 3.6 months, p=0.0028) compared to patients who did not (figure 1).Abstract 637 Table 1MVA* of association between irAEs and clinical outcomesAbstract 637 Figure 1Kaplan-Meier curves of association between immune-related adverse events (irAEs) and overall survival (OS, top panel) and progression-free survival (PFS, bottom panel)ConclusionsWe showed that mRCC patients who experienced irAEs, particularly thyroid irAEs, had improved clinical outcomes. This suggests that irAEs may be prognostic of favorable outcomes in mRCC patients treated with ICI. Larger, prospective studies are needed to validate these findings.AcknowledgementsResearch reported in this publication was supported in part by the Breen Foundation and the Biostatistics Shared Resource of Winship Cancer Institute of Emory University and NIH/NCI under award number P30CA138292. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.Trial RegistrationNot applicableEthics ApprovalThis retrospective study was approved by the Emory University Institutional Review Board.ConsentNot applicableReferencesNot applicable

Retrospective cohort analysis of real-world clinical outcomes in nonmetastatic (M0) castration-resistant prostate cancer (CRPC) treated with novel androgen receptor pathway inhibitors (ARPI).

2021 ◽  
Vol 39 (6_suppl) ◽  
pp. 51-51
Author(s):  
Richard Gagnon ◽  
Nimira S. Alimohamed ◽  
Alexander Watson ◽  
Eugene Batuyong ◽  
Alyssa Chow ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Clinical Outcomes ◽  
Real World ◽  
Retrospective Cohort ◽  
Cohort Analysis ◽  
Progression Free Survival ◽  
Rank Test ◽  
Castration Resistant Prostate Cancer ◽  
Survival Times ◽  
Free Survival

51 Background: The landscape of M0 CRPC has changed with the recent demonstration of metastasis-free survival (MFS) and overall survival (OS) improvements with the use of ARPIs in clinical trial settings. However, the extrapolation of this data to clinical practice is limited by strict exclusion criteria in these trials, including prior or concurrent malignancy, cardiovascular disease, or hypertension. The purpose of this study was to assess real-world outcomes in patients with M0 CRPC treated with ARPIs compared to historical controls. Methods: We designed a retrospective cohort study with the inclusion of patients in Alberta, Canada diagnosed with M0 CRPC between 2001-2020. Via chart review, we identified baseline characteristics, potential confounders, treatment details, and clinical outcomes. The primary outcome of interest was MFS. Secondary outcomes included: second progression-free survival (PFS2) and OS. Median survival times were measured using the Kaplan-Meier method and the log-rank test was used for comparison of outcomes based on ARPI exposure. Cox proportional hazard regression models were used to calculate hazard ratios (HR) accounting for impact of PSA doubling time (PSADT), use of osteoclast inhibiting agents, and presence of pelvic lymphadenopathy. Results: We identified 211 patients across multiple centres in Alberta with M0 CRPC, with 54 having received apalutamide (40/54), enzalutamide (7/54), or darolutamide (7/54). Median age at M0 CRPC diagnosis was 74 years; median PSADT was 4.4 months; and 19% of patients (40/211) had pelvic lymphadenopathy at diagnosis. Median MFS in patients treated with ARPIs was 47.5 months compared to 20.6 months in those not treated with ARPIs (HR, 0.23; 95% confidence interval [CI], 0.11-0.49; p < 0.001). Median PFS2 in ARPI treated patients was 66.3 months compared with 35.6 months (HR, 0.40; 95% CI, 0.18-0.87; p = 0.022). Median OS for patients treated with ARPI was not reached. Conclusions: Given the older age of men with advanced prostate cancer, real-world outcomes that include patients with comorbidities are important adjuncts to the interpretation of clinical trials exploring the benefit of novel therapeutics. Here, we demonstrate that in a real-world, unselected population of men with M0 CRPC, apalutamide, enzalutamide, and darolutamide seem to confer similar MFS and PFS2 benefits to those demonstrated in the SPARTAN, PROSPER, and ARAMIS studies. Real-world OS data remain immature and will be an important addition to these findings.

Lenalidomide plus dexamethasone is more effective than dexamethasone alone in patients with relapsed or refractory multiple myeloma regardless of prior thalidomide exposure

Blood ◽  
2008 ◽  
Vol 112 (12) ◽  
pp. 4445-4451 ◽  
Author(s):  
Michael Wang ◽  
Meletios A. Dimopoulos ◽  
Christine Chen ◽  
M. Teresa Cibeira ◽  
Michel Attal ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Overall Response Rate ◽  
Response Rate ◽  
Progression Free Survival ◽  
Efficacy And Safety ◽  
Time To Progression ◽  
Free Survival ◽  
Refractory Multiple Myeloma ◽  
Previously Treated ◽  
Survival Studies

AbstractThis analysis assessed the efficacy and safety of lenalidomide + dexamethasone in patients with relapsed or refractory multiple myeloma (MM) previously treated with thalidomide. Of 704 patients, 39% were thalidomide exposed. Thalidomide-exposed patients had more prior lines of therapy and longer duration of myeloma than thalidomide-naive patients. Lenalidomide + dexamethasone led to higher overall response rate (ORR), longer time to progression (TTP), and progression-free survival (PFS) versus placebo + dexamethasone despite prior thalidomide exposure. Among lenalidomide + dexamethasone-treated patients, ORR was higher in thalidomide-naive versus thalidomide-exposed patients (P = .04), with longer median TTP (P = .04) and PFS (P = .02). Likewise for dexamethasone alone-treated patients (P = .03 for ORR, P = .03 for TTP, P = .06 for PFS). Prior thalidomide did not affect survival in lenalidomide + dexamethasone-treated patients (36.1 vs 33.3 months, P > .05). Thalidomide-naive and thalidomide-exposed patients had similar toxicities. Lenalidomide + dexamethasone resulted in higher rates of venous thromboembolism, myelosuppression, and infections versus placebo + dexamethasone, independent of prior thalidomide exposure. Lenalido-mide + dexamethasone was superior to placebo + dexamethasone, independent of prior thalidomide exposure. Although prior thalidomide may have contributed to inferior TTP and PFS compared with thalidomide-naive patients, these parameters remained superior compared with placebo + dexamethasone; similar benefits compared with placebo + dexamethasone were not evident for thalidomide-exposed patients in terms of overall survival. Studies were registered at http://www.clinicaltrials.gov under NCT00056160 and NCT00424047.

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